got this from reddit, awesome theme like the colors.

from reddit,nice work man

Very clean and aesthetic. I like this!

Works perfectly in Firefox, and also works quite well in Thunderbird, theming everfything except the email headers and the email itself. Lightning looks great!

Also works perfectly in Tree Style Tab if you use the plain theme and add the following in TST's options:
tab-item.active { background-color: #44475a; }

Good